Lower Ordovician (Volkhovian-Kundan) conodonts from Hagudden, northern Oeland, Sweden.

This paper presents taxonomical description of Early Ordovician conodonts recovered from the limestones at Hagudden, in northern Oeland (Sweden). 33 samples yielded about 20.000 conodont elements. 18 genera and 36 species are described. Two genera are emended and redefined in terms of multielement taxonomy. Two new species are described. The fauna is typical of the Baltic region. The conodont zones are correlated with the trilobite zones. The faunas of the Volkhovian Stage and the Hunderumian Substage and Valastean Substage of the Kundan Stage are discussed